Here's Kate—pre-royal-engagement and post-trial-breakup—in 2009 at a fancy friend's wedding (to be specific: Nicholas Van Cutsem and Alice Hadden-Paton love just saying those names) wearing a regally embroidered jacket and very British fascinator. She would repeat the outfit a few years later for an official royal appearance.

There it is! The official engagement portrait in 2010 and that royal blue Issa dress that immediately sold out (starting the trend of many Kate-fueled runs on pieces). Earlier this year, Issa collaborated with Banana Republic on a line inspired by that dress. But is there a handsome prince who comes with the purchase?

We couldn't have a Kate roundup without another look at her breathtaking wedding gown not-so-secretly designed by Sarah Burton of Alexander McQueen now, could we? And we have Kate to thank for making sleeves on wedding dresses de rigueur again.

While Kate is very loyal to designers like Jenny Packham and Sarah Burton of Alexander McQueen, she's not afraid to experiment with edgy, contemporary names too. But with demure, ladylike, Queen Elizabeth-approved styles, of course. Here she is looking lovely in a draped lilac dress Roksanda Ilincic.

It doesn't happen super often, but sometimes Kate will dazzle us with a print. She opted for Michelle Obama-favorite Prabal Gurung for this brightly patterned outing earlier this year. Love.